1 /*
2  * Copyright 2015 Red Hat Inc.
3  *
4  * Permission is hereby granted, free of charge, to any person obtaining a
5  * copy of this software and associated documentation files (the "Software"),
6  * to deal in the Software without restriction, including without limitation
7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8  * and/or sell copies of the Software, and to permit persons to whom the
9  * Software is furnished to do so, subject to the following conditions:
10  *
11  * The above copyright notice and this permission notice shall be included in
12  * all copies or substantial portions of the Software.
13  *
14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20  * OTHER DEALINGS IN THE SOFTWARE.
21  *
22  * Authors: Ben Skeggs <bskeggs@redhat.com>
23  */
24 #include "priv.h"
25 
26 #include <core/pci.h>
27 
28 /* MSI re-arm through the PRI appears to be broken on NV46/NV50/G84/G86/G92,
29  * so we access it via alternate PCI config space mechanisms.
30  */
31 void
32 nv46_pci_msi_rearm(struct nvkm_pci *pci)
33 {
34 	struct nvkm_device *device = pci->subdev.device;
35 	struct pci_dev *pdev = device->func->pci(device)->pdev;
36 	pci_write_config_byte(pdev, 0x68, 0xff);
37 }
38 
39 static const struct nvkm_pci_func
40 nv46_pci_func = {
41 	.rd32 = nv40_pci_rd32,
42 	.wr08 = nv40_pci_wr08,
43 	.wr32 = nv40_pci_wr32,
44 	.msi_rearm = nv46_pci_msi_rearm,
45 };
46 
47 int
48 nv46_pci_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst,
49 	     struct nvkm_pci **ppci)
50 {
51 	return nvkm_pci_new_(&nv46_pci_func, device, type, inst, ppci);
52 }
53